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404 lines
8.1 KiB
404 lines
8.1 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* AMD Secure Processor device driver |
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* |
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* Copyright (C) 2013,2019 Advanced Micro Devices, Inc. |
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* |
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* Author: Tom Lendacky <[email protected]> |
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* Author: Gary R Hook <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/device.h> |
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#include <linux/pci.h> |
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#include <linux/pci_ids.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/kthread.h> |
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#include <linux/sched.h> |
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#include <linux/interrupt.h> |
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#include <linux/spinlock.h> |
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#include <linux/delay.h> |
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#include <linux/ccp.h> |
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#include "ccp-dev.h" |
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#include "psp-dev.h" |
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#define MSIX_VECTORS 2 |
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struct sp_pci { |
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int msix_count; |
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struct msix_entry msix_entry[MSIX_VECTORS]; |
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}; |
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static struct sp_device *sp_dev_master; |
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static int sp_get_msix_irqs(struct sp_device *sp) |
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{ |
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struct sp_pci *sp_pci = sp->dev_specific; |
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struct device *dev = sp->dev; |
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struct pci_dev *pdev = to_pci_dev(dev); |
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int v, ret; |
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for (v = 0; v < ARRAY_SIZE(sp_pci->msix_entry); v++) |
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sp_pci->msix_entry[v].entry = v; |
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ret = pci_enable_msix_range(pdev, sp_pci->msix_entry, 1, v); |
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if (ret < 0) |
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return ret; |
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sp_pci->msix_count = ret; |
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sp->use_tasklet = true; |
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sp->psp_irq = sp_pci->msix_entry[0].vector; |
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sp->ccp_irq = (sp_pci->msix_count > 1) ? sp_pci->msix_entry[1].vector |
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: sp_pci->msix_entry[0].vector; |
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return 0; |
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} |
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static int sp_get_msi_irq(struct sp_device *sp) |
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{ |
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struct device *dev = sp->dev; |
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struct pci_dev *pdev = to_pci_dev(dev); |
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int ret; |
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ret = pci_enable_msi(pdev); |
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if (ret) |
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return ret; |
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sp->ccp_irq = pdev->irq; |
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sp->psp_irq = pdev->irq; |
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return 0; |
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} |
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static int sp_get_irqs(struct sp_device *sp) |
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{ |
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struct device *dev = sp->dev; |
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int ret; |
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ret = sp_get_msix_irqs(sp); |
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if (!ret) |
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return 0; |
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/* Couldn't get MSI-X vectors, try MSI */ |
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dev_notice(dev, "could not enable MSI-X (%d), trying MSI\n", ret); |
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ret = sp_get_msi_irq(sp); |
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if (!ret) |
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return 0; |
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/* Couldn't get MSI interrupt */ |
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dev_notice(dev, "could not enable MSI (%d)\n", ret); |
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return ret; |
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} |
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static void sp_free_irqs(struct sp_device *sp) |
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{ |
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struct sp_pci *sp_pci = sp->dev_specific; |
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struct device *dev = sp->dev; |
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struct pci_dev *pdev = to_pci_dev(dev); |
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if (sp_pci->msix_count) |
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pci_disable_msix(pdev); |
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else if (sp->psp_irq) |
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pci_disable_msi(pdev); |
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sp->ccp_irq = 0; |
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sp->psp_irq = 0; |
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} |
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static bool sp_pci_is_master(struct sp_device *sp) |
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{ |
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struct device *dev_cur, *dev_new; |
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struct pci_dev *pdev_cur, *pdev_new; |
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dev_new = sp->dev; |
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dev_cur = sp_dev_master->dev; |
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pdev_new = to_pci_dev(dev_new); |
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pdev_cur = to_pci_dev(dev_cur); |
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if (pdev_new->bus->number < pdev_cur->bus->number) |
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return true; |
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if (PCI_SLOT(pdev_new->devfn) < PCI_SLOT(pdev_cur->devfn)) |
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return true; |
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if (PCI_FUNC(pdev_new->devfn) < PCI_FUNC(pdev_cur->devfn)) |
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return true; |
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return false; |
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} |
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static void psp_set_master(struct sp_device *sp) |
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{ |
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if (!sp_dev_master) { |
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sp_dev_master = sp; |
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return; |
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} |
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if (sp_pci_is_master(sp)) |
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sp_dev_master = sp; |
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} |
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static struct sp_device *psp_get_master(void) |
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{ |
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return sp_dev_master; |
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} |
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static void psp_clear_master(struct sp_device *sp) |
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{ |
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if (sp == sp_dev_master) { |
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sp_dev_master = NULL; |
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dev_dbg(sp->dev, "Cleared sp_dev_master\n"); |
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} |
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} |
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static int sp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
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{ |
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struct sp_device *sp; |
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struct sp_pci *sp_pci; |
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struct device *dev = &pdev->dev; |
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void __iomem * const *iomap_table; |
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int bar_mask; |
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int ret; |
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ret = -ENOMEM; |
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sp = sp_alloc_struct(dev); |
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if (!sp) |
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goto e_err; |
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sp_pci = devm_kzalloc(dev, sizeof(*sp_pci), GFP_KERNEL); |
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if (!sp_pci) |
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goto e_err; |
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sp->dev_specific = sp_pci; |
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sp->dev_vdata = (struct sp_dev_vdata *)id->driver_data; |
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if (!sp->dev_vdata) { |
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ret = -ENODEV; |
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dev_err(dev, "missing driver data\n"); |
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goto e_err; |
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} |
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ret = pcim_enable_device(pdev); |
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if (ret) { |
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dev_err(dev, "pcim_enable_device failed (%d)\n", ret); |
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goto e_err; |
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} |
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bar_mask = pci_select_bars(pdev, IORESOURCE_MEM); |
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ret = pcim_iomap_regions(pdev, bar_mask, "ccp"); |
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if (ret) { |
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dev_err(dev, "pcim_iomap_regions failed (%d)\n", ret); |
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goto e_err; |
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} |
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iomap_table = pcim_iomap_table(pdev); |
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if (!iomap_table) { |
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dev_err(dev, "pcim_iomap_table failed\n"); |
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ret = -ENOMEM; |
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goto e_err; |
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} |
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sp->io_map = iomap_table[sp->dev_vdata->bar]; |
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if (!sp->io_map) { |
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dev_err(dev, "ioremap failed\n"); |
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ret = -ENOMEM; |
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goto e_err; |
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} |
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ret = sp_get_irqs(sp); |
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if (ret) |
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goto e_err; |
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pci_set_master(pdev); |
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sp->set_psp_master_device = psp_set_master; |
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sp->get_psp_master_device = psp_get_master; |
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sp->clear_psp_master_device = psp_clear_master; |
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ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48)); |
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if (ret) { |
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ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); |
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if (ret) { |
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dev_err(dev, "dma_set_mask_and_coherent failed (%d)\n", |
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ret); |
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goto free_irqs; |
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} |
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} |
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dev_set_drvdata(dev, sp); |
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ret = sp_init(sp); |
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if (ret) |
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goto free_irqs; |
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return 0; |
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free_irqs: |
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sp_free_irqs(sp); |
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e_err: |
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dev_notice(dev, "initialization failed\n"); |
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return ret; |
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} |
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static void sp_pci_shutdown(struct pci_dev *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct sp_device *sp = dev_get_drvdata(dev); |
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if (!sp) |
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return; |
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sp_destroy(sp); |
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} |
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static void sp_pci_remove(struct pci_dev *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct sp_device *sp = dev_get_drvdata(dev); |
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if (!sp) |
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return; |
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sp_destroy(sp); |
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sp_free_irqs(sp); |
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} |
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static int __maybe_unused sp_pci_suspend(struct device *dev) |
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{ |
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struct sp_device *sp = dev_get_drvdata(dev); |
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return sp_suspend(sp); |
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} |
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static int __maybe_unused sp_pci_resume(struct device *dev) |
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{ |
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struct sp_device *sp = dev_get_drvdata(dev); |
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return sp_resume(sp); |
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} |
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#ifdef CONFIG_CRYPTO_DEV_SP_PSP |
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static const struct sev_vdata sevv1 = { |
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.cmdresp_reg = 0x10580, |
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.cmdbuff_addr_lo_reg = 0x105e0, |
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.cmdbuff_addr_hi_reg = 0x105e4, |
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}; |
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static const struct sev_vdata sevv2 = { |
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.cmdresp_reg = 0x10980, |
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.cmdbuff_addr_lo_reg = 0x109e0, |
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.cmdbuff_addr_hi_reg = 0x109e4, |
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}; |
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static const struct tee_vdata teev1 = { |
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.cmdresp_reg = 0x10544, |
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.cmdbuff_addr_lo_reg = 0x10548, |
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.cmdbuff_addr_hi_reg = 0x1054c, |
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.ring_wptr_reg = 0x10550, |
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.ring_rptr_reg = 0x10554, |
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}; |
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static const struct psp_vdata pspv1 = { |
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.sev = &sevv1, |
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.feature_reg = 0x105fc, |
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.inten_reg = 0x10610, |
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.intsts_reg = 0x10614, |
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}; |
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static const struct psp_vdata pspv2 = { |
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.sev = &sevv2, |
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.feature_reg = 0x109fc, |
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.inten_reg = 0x10690, |
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.intsts_reg = 0x10694, |
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}; |
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static const struct psp_vdata pspv3 = { |
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.tee = &teev1, |
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.feature_reg = 0x109fc, |
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.inten_reg = 0x10690, |
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.intsts_reg = 0x10694, |
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}; |
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#endif |
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static const struct sp_dev_vdata dev_vdata[] = { |
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{ /* 0 */ |
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.bar = 2, |
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#ifdef CONFIG_CRYPTO_DEV_SP_CCP |
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.ccp_vdata = &ccpv3, |
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#endif |
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}, |
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{ /* 1 */ |
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.bar = 2, |
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#ifdef CONFIG_CRYPTO_DEV_SP_CCP |
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.ccp_vdata = &ccpv5a, |
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#endif |
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#ifdef CONFIG_CRYPTO_DEV_SP_PSP |
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.psp_vdata = &pspv1, |
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#endif |
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}, |
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{ /* 2 */ |
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.bar = 2, |
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#ifdef CONFIG_CRYPTO_DEV_SP_CCP |
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.ccp_vdata = &ccpv5b, |
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#endif |
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}, |
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{ /* 3 */ |
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.bar = 2, |
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#ifdef CONFIG_CRYPTO_DEV_SP_CCP |
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.ccp_vdata = &ccpv5a, |
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#endif |
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#ifdef CONFIG_CRYPTO_DEV_SP_PSP |
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.psp_vdata = &pspv2, |
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#endif |
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}, |
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{ /* 4 */ |
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.bar = 2, |
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#ifdef CONFIG_CRYPTO_DEV_SP_CCP |
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.ccp_vdata = &ccpv5a, |
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#endif |
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#ifdef CONFIG_CRYPTO_DEV_SP_PSP |
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.psp_vdata = &pspv3, |
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#endif |
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}, |
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{ /* 5 */ |
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.bar = 2, |
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#ifdef CONFIG_CRYPTO_DEV_SP_PSP |
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.psp_vdata = &pspv2, |
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#endif |
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}, |
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}; |
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static const struct pci_device_id sp_pci_table[] = { |
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{ PCI_VDEVICE(AMD, 0x1537), (kernel_ulong_t)&dev_vdata[0] }, |
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{ PCI_VDEVICE(AMD, 0x1456), (kernel_ulong_t)&dev_vdata[1] }, |
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{ PCI_VDEVICE(AMD, 0x1468), (kernel_ulong_t)&dev_vdata[2] }, |
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{ PCI_VDEVICE(AMD, 0x1486), (kernel_ulong_t)&dev_vdata[3] }, |
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{ PCI_VDEVICE(AMD, 0x15DF), (kernel_ulong_t)&dev_vdata[4] }, |
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{ PCI_VDEVICE(AMD, 0x1649), (kernel_ulong_t)&dev_vdata[4] }, |
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{ PCI_VDEVICE(AMD, 0x14CA), (kernel_ulong_t)&dev_vdata[5] }, |
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/* Last entry must be zero */ |
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{ 0, } |
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}; |
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MODULE_DEVICE_TABLE(pci, sp_pci_table); |
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static SIMPLE_DEV_PM_OPS(sp_pci_pm_ops, sp_pci_suspend, sp_pci_resume); |
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static struct pci_driver sp_pci_driver = { |
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.name = "ccp", |
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.id_table = sp_pci_table, |
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.probe = sp_pci_probe, |
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.remove = sp_pci_remove, |
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.shutdown = sp_pci_shutdown, |
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.driver.pm = &sp_pci_pm_ops, |
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}; |
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int sp_pci_init(void) |
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{ |
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return pci_register_driver(&sp_pci_driver); |
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} |
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void sp_pci_exit(void) |
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{ |
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pci_unregister_driver(&sp_pci_driver); |
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}
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